656394 has 16 divisors (see below), whose sum is σ = 1355520. Its totient is φ = 211680.

The previous prime is 656389. The next prime is 656407. The reversal of 656394 is 493656.

It is a happy number.

656394 is nontrivially palindromic in base 16.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 656394.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1579 + ... + 1950.

It is an arithmetic number, because the mean of its divisors is an integer number (84720).

2⁶⁵⁶³⁹⁴ is an apocalyptic number.

656394 is an abundant number, since it is smaller than the sum of its proper divisors (699126).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

656394 is a wasteful number, since it uses less digits than its factorization.

656394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3565.

The product of its digits is 19440, while the sum is 33.

The square root of 656394 is about 810.1814611555. The cubic root of 656394 is about 86.9070218203.

The spelling of 656394 in words is "six hundred fifty-six thousand, three hundred ninety-four".